From: I G <rubycrazy@...>
Date: 2007-03-16T16:09:42+09:00
Subject: Trapping ESC key

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I am a Ruby newbie and am trying to implement problem 1 mentioned here -
http://www.rubyrailways.com/implementing-15-exercises-for-learning-a-new-programming-language/


I am stuck and can't find a simple and portable way to trap the ESC key. Any
pointers, help is most appreciated. The code I have now is -

require 'Win32API'
def getchar
  char = Win32API.new("crtdll", "_getch", [], 'L').call
  if char == 27 # ESC key
    exit
  end
end

i = 0
loop do
  print "#{i+=1}, "
  getchar
end

Thanks.

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